After opening up the TrackR App, we then had to enable permissions and select 'Add a TrackR Device' in the 'Let's see how TrackR can help you' screen.
We then allowed TrackR to access the phone's location, selected the 'TrackR pixel' to set up, and named the TrackR pixel.
Once logged in, the TrackR App finished setup with some purchasing questions and surveys.
The TrackR App then used the phone's GPS location as the location for the TrackR pixel connected over Bluetooth. Note that you can't have more than one phone connected over Bluetooth to the TrackR pixel at one time. This means that if you have two phones at home trying to find the TrackR pixel, only one phone will actually make the Bluetooth connection and send the GPS information to the cloud, when is then used by the other phone to locate the same TrackR pixel.
Other than naming the TrackR pixel, the TrackR App gives you a lot of icons to choose from in order to make it easier to differentiate your tracker devices, especially if you are using several of them to track your keys, wallets, etc.